Looking latch



(Model.)

G VOLL 2 Sheets-Sheet 1.

LOCKING LATCH. i No. 265,474. Patented Oct. 3,1882.

INI

(Model.) 2 Sheets-Sheet 2.

G. VOLL.

LOCKING LATGH. No. 265,474. Patented Oct. 3, 1882,

Iliriin States Aran? erica.-

GEORGE VOLL, OF CINCINNATI, OHIO, ASSIGNOR TO THE MORRIS SASH LOCKMANUFACTURING COMPANY, OF SAME PLACE.

LOCKING-LATCH.

SPECIFICATION forming part of Letters Patent No. 265,474, dated October3, 1882.

Application led June 17, 1882. (Model.)

To all whom it may concer-n Beit known that I, GEORGE VOLL, ofUincinnati, Hamilton county, Ohio, have invented new and usefulImprovements in Latch-Locks, of which the following is a specification.

In the accompanying drawings, Figure 1 is a perspective view of myindependent safetycylinder and a key suitable for use therewith. Figs. 2and 3 are elevations of my latch-lock proper without its cap, Fig. 2 inthe normal condition of the lock and Fig. 3 with the latch retracted andstopped back. Fig. et is a partlysectioned elevation of mysafety-cylinder in place upon the door. Fig. 5 shows a portion ofthelock-case and the latch, the knob and the follower detached therefrom.Fig. 6 is a partly-sectioned view ot` the entire device in place uponthe door.

A may represent a portion of a door.

B is my safety-cylinder proper, having a dat or othernon-circulartongue, C, which is capable of rotation by key D in themanner customary with locks of this description, and which, when theparts are all in place upon the door, occupies a cavity, e, ofcorresponding shape and size, in the follower E. The cylinderBisscrew-threaded exteriorly to lit a corresponding interiorly-threadedsleeve, F, which may be screwed so far onto the said cylinder as to fita door ot' any thickness which has been previously bored to receive it.Spurs b on cylinder B occupy indentations in the door and prevent therotation ot' the cylinder, and nicksfin sleeve F enableit to be screwedin or out by the use of a suitable driver. The safety-cylinder may haveaffixed to its interior any suitable system orarrangement ofwards, ofwhich no specic description is here necessary. Flange b on cylinder andangej" on sleeve F serve to completely close the excavation in the dooron both sides and to secure a neat finish.

I may represent the case of my latch-lock proper, and J the cap of same.The oblong slot z' in case I permits insertion ot' shank K ot' knob L,the said knob being so presented for insertion as that its lugs K K passeasily through the slot, after which it is turned a quarter round, so asto permit its lugs to enter notches c e in the follower-hub and itsshank K to occupy the counterbore 6 in said hub, and inasmuch as thevibrations of the follower when in use never reach a quarter-turn fromthe vertical, the knob-shank is thus securely retained within the casewithout screws or other extraneous fastening devices other than the capJ of the lock.

M is a vibratablelatch-stop, which,by means of knob N, can be made tobear against shoulder o on latch O, as seen in Fig. 3, or can beretracted to the position shown in Fig. 2, in which a spur, m, upon thestop is brought to rest against a stump, l?. The stop Mis securelyretained to either its effective or its non-effective position by thesame spring, Q., which operates the latch.

It is apparent that my latch-lock proper is capable of removal from thedoor at any time without disturbing the safety device, which latter isseparately applied to the door and so formed as to tit a door of anythickness, and when secured iu place to completely close the boring orexcavation made in the substance of the door for its reception and tomake a neat nish which excludes dust.

I claim as new and of my inventionl. In alatclilock,the combination,withcase I, having oblong slot 2'., of knob L, whose shank K has twodiainetrically-opposite lugs, k k',

follower E, having cavity c, notches c e, and counterbore 6', latch O,spring Q, and cap J, substantially as set forth.

2. In combination,substantially as described, with a latch-lock havingnotched or indented follower E, the separable safety-cylinder consistingof cylinder proper, B b b', tongue C, and sleeve Ffj", substantially asset forth.

In testimony of which invention I hereunto set my hand.

l GEORGE voLL. Wlitnesses:

GEORGE H. KNIGHT, JAs. R. FORAKER.

